docs: def path_trace(map_projection, pts, closed=False, meta_data=None):
      '''
      path_trace(proj, points) yields a path-trace object that represents the given path of points on
        the given map projection proj.
      
      The following options may be given:
        * closed (default: False) specifies whether the points form a closed loop. If they do form
          such a loop, the points should be given in the same ordering (counter-clockwise or
          clockwise) that mesh vertices are given in; usually counter-clockwise.
        * meta_data (default: None) specifies an optional additional meta-data map to append to the
          object.
      '''
      return PathTrace(map_projection, pts, closed=closed, meta_data=meta_data)